Question

On the first day of autumn (in the northern hemisphere), what is the Azimuth and Elevation...

On the first day of autumn (in the northern hemisphere), what is the Azimuth and Elevation of the setting Sun for an observer

a) on the equator

b) at 23.5 degrees latitude

c) at 60 degrees latitude

Science   Advanced-Physics   
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Answer #1

The first day of autumn (23 September) is when the days and nights are equal in both hemisphere, this means sunset will happen at the same moment at any given longitude, so elevation will be same .

The Terminator circle of Earth (line that divides the daylit side and the dark night side of earth) will meet every latitude circle perpendicularly in that day. So sun will set exactly at west for any observer at any given longitude. So the azimuth of the Sun will be , this is same for all sunset observer at that day.

So,

A, B, C ) .

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